test: move area_cli tests into cli directory (#3842)

* test: move area_cli tests into cli directory

* test: include research CLI status in cli test move

tests/cli/test_mail_cli_read_empty_fetch.py

@@ -0,0 +1,57 @@
+import sys
+from types import ModuleType, SimpleNamespace
+
+import pytest
+
+from tests.helpers.cli_loader import load_script
+from tests.helpers.db_stubs import make_core_db_stub
+
+
+class _Conn:
+    def select(self, folder, readonly=True):
+        return "OK", [b"1"]
+
+    def fetch(self, uid, spec):
+        # IMAP can return OK with an empty payload (UID expunged mid-session).
+        return "OK", []
+
+
+class _ImapCtx:
+    def __init__(self, account):
+        pass
+
+    def __enter__(self):
+        return _Conn()
+
+    def __exit__(self, *a):
+        return False
+
+
+def _load_mail_cli(monkeypatch):
+    helpers = ModuleType("routes.email_helpers")
+    helpers._imap = _ImapCtx
+    helpers._get_email_config = lambda account=None: {}
+    helpers._decode_header = lambda value: value
+    helpers._extract_text = lambda msg: ""
+    helpers._extract_html = lambda msg: ""
+    helpers._list_attachments_from_msg = lambda msg: []
+    pollers = ModuleType("routes.email_pollers")
+    pollers._scheduled_poll_once = lambda: {}
+    pollers._run_auto_summarize_once = lambda **kwargs: ""
+    monkeypatch.setitem(sys.modules, "routes.email_helpers", helpers)
+    monkeypatch.setitem(sys.modules, "routes.email_pollers", pollers)
+    make_core_db_stub(
+        monkeypatch,
+        attributes={"SessionLocal": object, "EmailAccount": object},
+        install_core_package=True,
+    )
+    return load_script("odysseus-mail")
+
+
+def test_cmd_read_handles_empty_fetch_payload(monkeypatch):
+    cli = _load_mail_cli(monkeypatch)
+    args = SimpleNamespace(account="acc", folder="INBOX", uid="5", html=False)
+    # old code did raw = msg_data[0][1] on the empty list and raised IndexError;
+    # the guard turns it into a clean fail() (SystemExit).
+    with pytest.raises(SystemExit):
+        cli.cmd_read(args)